64results about How to "Low asphaltene content" patented technology

A process and apparatus are provided for upgrading steam cracker tars from steam crackers. The invention also relates to a steam cracking process and apparatus for reducing yields of tars produced from steam cracking while increasing yields of higher value products by heating steam cracker tar, in the presence of hydrogen donor compounds, e.g., tetralin. The hydrogen donor compounds can be provided in a hydrogen donor-rich hydrocarbon stream, e.g., light cycle oils, or low sulfur vacuum tower bottoms. The treated tar can be separated into gas oil, fuel oil and tar streams.

A process and apparatus are provided for the present invention relates to a process for upgrading tar-containing effluent from a steam cracker furnace that comprises: a) contacting a steam cracker tar-containing effluent with steam and for a time, sufficient to convert at least a portion of the steam cracker tar to a mixture comprising lower boiling molecules and the steam cracker tar-containing effluent; and b) separating the mixture from step a) into i) at least one tar-lean product; and ii) a tar-rich product having a final boiling above the final boiling point of the at least one tar-lean product. Step a) can includes at least one of: 1) contacting said steam cracker tar-containing effluent with steam added to the effluent in a transfer line downstream of a steam cracker furnace comprising a quench inlet, with the steam added through or downstream of the quench inlet; 2) contacting the steam cracker tar-containing effluent with steam under heat soaking conditions in a heat soaking vessel to which the steam is added; and 3) contacting the steam cracker tar-containing effluent with steam under visbreaking conditions in a visbreaker. The steam treated tar can be separated into higher value gas oil, fuel oil and tar streams.

The invention discloses a method for producing clean fuel oil from ethylene tar. The method consists of: fractionating ethylene tar into light fraction and heavy fraction, mixing the heavy fraction with a conventional coking raw material, conducting delayed coking to obtain coker gasoline and coker diesel oil, performing hydrofining on the coker gasoline, mixing the coker diesel oil with the ethylene tar light fraction, subjecting the mixture to hydrotreating, and leaving the reaction effluent and the coker gasoline hydrofining product together to undergo separation by a fractionating tower, thus obtaining clean gasoline and diesel oil products. Directed at the characteristics of high content of aromatic hydrocarbon, colloid, carbon residue and asphaltene in ethylene tar, the method provided in the invention fractionates the ethylene tar into light fraction and heavy fraction, and adopts different processing processes according to the composition characteristics of each fraction, thus not only enhancing the utilization rate of ethylene tar, increasing the yield of light fuel oil, but also improving the product quality of light fuel oil, and enabling the equipment to run smoothly for a long period.

The invention discloses a tire treatment system. The tire treatment system comprises a pretreatment device, a revolving bed pyrolyzing furnace, a heat accumulating type fuel gas radiating pipe burner, a direct cooling tower, an oil cooler, an oil storage tank, a purifier, and a gas storage tank, wherein the pretreatment device treats a tire so as to form a pyrolyzing raw material. The revolving bed pyrolyzing furnace receives the pyrolyzing raw material, and a plurality of gas outlets are formed in the side wall of the revolving bed pyrolyzing furnace. The heat accumulating type fuel gas radiating pipe burner heats the pyrolyzing raw material, and a plurality of gas outlets are located below the heat accumulating type fuel gas radiating pipe burner in vertical direction. The direct cooling tower receives an oil-gas product and separates oil from gas. The oil cooler receives and cools the separated pyrolyzing oil, and the cooled pyrolyzing oil is introduced into the direct cooling tower. The oil storage tank and the oil cooler are communicated. The purifier receives the separated pyrolyzing gas. The gas storage tank and the purifier are communicated, and the gas storage tank provides a gas source for the heat accumulating type fuel gas radiating pipe burner. The tire treatment system, pyrolyzing oil is high in yield and good in quality, and the operating cost is low.

A process for upgrading oil including optionally pre-treating a heavy oil including at least one dissolved gas, asphaltenes, water, and mineral solids; reducing at least one dissolved gas content from said heavy oil, optionally further reducing water content from said heavy oil; adding a paraffinic solvent to said heavy oil, at a predetermined paraffinic solvent:heavy oil ratio, facilitating separation of asphaltenes, water, and mineral solids from the heavy oil resulting in a de-asphalted or partially de-asphalted oil (“DAO”)-paraffinic solvent stream, comprising a low asphaltenes content DAO-paraffinic solvent stream and an asphaltenes-mineral solids-paraffinic solvent-water slurry stream; optionally separating the paraffinic solvent and water from the asphaltenes-mineral solids-paraffinic solvent-water slurry stream; optionally separating the DAO-paraffinic solvent stream into a paraffinic solvent rich stream and a DAO stream; and optionally adding diluent to the DAO stream resulting in transportable oil.

An integrated method for mesophase pitch and petrochemicals production. The method including supplying crude oil to a reactor vessel; heating the crude oil in the reactor vessel to a predetermined temperature for a predetermined amount of time; reducing asphaltene content in the crude oil by allowing polymerization reactions to occur in the reactor vessel at an elevated pressure in the absence of oxygen; producing a three-phase upgraded hydrocarbon product comprising gas, liquid, and solid hydrocarbon components, where the liquid hydrocarbon component comprises deasphalted oil and the solid hydrocarbon component comprises mesophase pitch; separating the gas, liquid, and solid hydrocarbon components; directly utilizing the liquid hydrocarbon component for petrochemicals production; and directly utilizing the solid hydrocarbon component for carbon artifact production.

The invention belongs to the field of catalyst synthesis, and particularly relates to a preparation method and an application of a catalyst for visbreaking behavior of heavy oil by aquathermolysis. The method comprises specific steps as follows: ferric chloride is weighed and added to a three-neck beaker, ethanol, water, n-hexane and oleic acid are added to the three-neck beaker in sequence, magnetic stirring is performed, NaOH is added, heating and reflux condensation are performed, after a ferric oleate compound and an oleic acid mixture are synthesized and added to sodium alkylbenzene sulfonate, a mixture is dissolved in octyl ether, 1-octadecene or 1-eicosylene, a mixed solution is subjected to temperature programming and then cooled to the room temperature, ethanol is added to the solution, centrifugal separation is performed, and the target product, namely, the catalyst for visbreaking behavior of the heavy oil by aquathermolysis is obtained. The target product is cheap and easily available and has low energy consumption and excellent visbreaking effect, and physical properties and nanoscale can be set by selecting correct reaction temperature, reaction solvent or reaction time.

An asphalt cementing material for spreading pavement in tropical region is prepared from proper heavy oil through ordinary-pressure or vacuum distilling to obtain vacuum residual oil, removing asphalt by solvent to obtain the target asphat, and optionally further treating such as oxidizing or mixing it with residual oil. Its advantages are high content of asphalt colloid, low content of asphalt, and high softening point (60 deg.C) and viscosity.

A production method of coal-based needle coke aims to save energy and improve product quality. The method provided by the invention comprises the steps of: first dehydrating coal tar to moisture content of 2-3%, heating to 120-130 DEG C, and then dehydrating to moisture content of less than 0.5%; then heating to 390-410 DEG C; sending coal tar pitch at bottom of the two-stage evaporator into a bulkhead type coal tar pitch extraction column; respectively heating an aliphatic extraction solvent and an aromatic extraction solvent to 110-250 DEG C, and mixing 0.5-1 part of an aliphatic solvent and 3-5 parts of an aromatic solvent to obtain an extractant; mixing the extractant and the coal pitch in a weight ratio of 1:0.5-1.3, and adding the mixture from the upper part of the bulkhead type coal tar pitch extraction column; discharging purified coal tar pitch from the middle part of the bulkhead type coal tar pitch extraction column; adding coking heavy oil into the coal tar pitch for modulation, sending the mixture into a middle part of a delayed coking distillate tower, distilling and pumping out from tower bottom, and heating the mixture at 520-580 DEG C and sending the mixture into the coking tower to obtain green coke; and calcining in a rotary furnace for 3-12 h, and escaping remaining volatile matters to prepare the coal-based needle coke.

The invention discloses a plant-mixed hot asphalt mixture and a preparation method thereof, and relates to the technical field of recycled asphalt processing. The plant-mixed hot asphalt mixture is prepared from the following components in parts by weight: 40 to 60 parts of recycled mixed asphalt old material; 30 to 50 parts of a new aggregate; 3-5 parts of asphalt; 1-3 parts of mineral powder; 0.1 to 0.5 part of a regenerant; 0.5-1 part of filler. The preparation method comprises the following steps: S1, adding the recycled mixed asphalt old material, the new aggregate and the mineral powderinto a drying barrel, and uniformly stirring to obtain a mixture; S2, adding the dried mixture into a stirring cylinder, heating 1/2-2/3 of asphalt to 150-170 DEG C, adding the asphalt into the stirring cylinder, and uniformly stirring; and S3, adding the regenerant into the stirring cylinder, uniformly stirring, adding the remaining asphalt, and uniformly stirring to obtain the plant-mixed hot asphalt mixture. The asphalt mixture prepared by the preparation method has the advantages of higher structural strength, longer service life and good pavement performance.

A purification method for coal tar maltha aims to save energy and improve grade of coal asphalt raw material. The method provided by the invention comprises the steps of: conducting rough machining on the coal tar, cutting coal tar pitch with a softening point of 30-40 DEG C, and sending into a bulkhead type coal tar pitch extraction column for extraction; respectively heating an aliphatic extraction solvent and an aromatic extraction solvent to 110-250 DEG C; taking 0.5-1 part of an aliphatic solvent and 3-5 parts of an aromatic solvent, and mixing the two into an extractant by a static mixer; thoroughly stirring and mixing the extractant and coal tar pitch by a proportion of 1:0.5-1.3 with the static mixer, and adding the mixture from the upper part of the bulkhead type coal tar pitch extraction column; discharging the sulfur nitrogen compound in coal tar pitch and combined with the extractant from bottom of the extraction column, so as to purify coal tar pitch by removal of sulfur compounds; and discharging the coal tar pitch from the middle part of the bulkhead type coal tar pitch extraction column.

The invention discloses a method for increasing the yield of clean fuel oil. The method comprises the following steps: subjecting ethylene tar to fractionation so as to obtain a light fraction and a heavy fraction, mixing the heavy fraction with a conventional coking raw material, then subjecting the mixture to a delay coking treatment so as to obtain a coking product, transporting the coking product and a C9 component from an ethylene device into a coking distillation tower, carrying out a distillation treatment so as to obtain a coking gasoline fraction and a coking diesel oil fraction, carrying out a hydro-refining treatment on the obtained coking gasoline fraction, mixing the coking diesel oil fraction with the ethylene tar light fraction, then subjecting the mixture to a hydro-treatment, and separating the products so as to obtain a gasoline product and a diesel oil product. The method fully utilizes the ethylene tar and C9 fraction, improves the utilization rate of by-products of ethylene device, prominently improves the yield and quality of lightweight fuel oil, and is beneficial for yield increasing of high quality clean fuel oil for refineries.

The invention discloses a method for producing light fuel oil from ethylene tar. The method is as below: fractionating ethylene tar into a light fraction and a heavy fraction; mixing the heavy fraction with a conventional coking raw material, and subjecting the mixture to delayed coking to obtain coker gasoline, coker diesel and coker gas oil; mixing the coker gasoline and the coker diesel with the light fraction of the ethylene tar, and subjecting the mixture to a hydrofining reaction; distilling the product to obtain a gasoline fraction I and a fraction heavier than the gasoline; subjecting the fraction heavier than the gasoline to a hydrogenation treatment to obtain light fuel oil, and distilling to obtain a gasoline fraction II and a diesel product; and mixing the gasoline fraction I and the gasoline fraction II to obtain a final gasoline product. The method provided by the invention utilizes the characteristics of high contents of ethylene tar aromatic hydrocarbons, colloid, carbon residue and glial and asphaltene of ethylene tar to fractionate the ethylene tar into the light fraction and the heavy fraction; different processing methods are employed to improve the added value of ethylene tar, increase yield of gasoline and diesel, improve product quality of light fuel oil and realize long-period stable operation of devices.

The invention discloses an underground mixed-phase thermal fluid generator and a using method thereof, and relates to the field of the oil and gas extraction. The underground mixed-phase thermal fluid generator comprises a top connecting component, a burning component, a vaporizing component, a spiral pressurizing component and a spraying component. The using method comprises the following steps: supplying one or more types of fluid to the generator, forming a combustion product through the combustion of an internal fuel and an oxidizing agent, spraying water into the combustion product to form the mixed-phase thermal fluid, injecting the mixed-phase thermal fluid into oil deposit through the spiral pressurizing component and the spraying component so as to improve the extraction rate of the crude oil and the natural gas. The underground mixed-phase thermal fluid generator has the characteristics of simple application and strong adaptability, and can be applied for primary oil recovery or tertiary oil recovery of the thickened oil and super thickened oil deposit hardly extracted by the traditional oil extraction method.

The invention provides a solid-liquid separation device for oil slurry and a solid-liquid separation system for oil slurry. The solid-liquid separation device for oil slurry comprises at least one mixer, at least one first-level separator and at least one second-level filter; the first-level separator is communicated with each mixer; the second-level filter is communicated with each first-level separator. Different from a traditional single filtering and separating technology, the invention adopts the first-level separation and the second-level filtering, so that the solid-liquid separation device for oil slurry can meet the requirement of long-period stable work.

The invention provides a method for pretreating a hydrogenation raw material by using an electric separation technology, and the method solves the pollution problem of metal particles and mechanical impurities in the hydrogenation raw material through an efficient electric separation method. According to the method, the process bottleneck of a traditional electrostatic separation method is brokenthrough, the method can be operated under a high-temperature condition, colloid and asphaltene in the hydrogenation raw materials are selectively removed, and long-period, stable, continuous and efficient production operation is achieved. According to the refined oil product obtained by the invention, the metal particle removal rate is higher than 95%, the mechanical impurity removal rate is higher than 99%, the colloid and asphaltene content is low, and meanwhile, the full utilization of the backwash oil and the optimal use of peripheral system supporting facilities are realized; and the defects of redundant cleaning operation, easy blockage of a filter screen, low treatment efficiency, frequent switching, high device maintenance cost and the like of the traditional filter are overcome.

The invention discloses an inferior residual oil solvent extraction apparatus and a processing technology thereof. The solvent extraction technology is characterized in that residual oil is extracted by using a solvent with several times of its volume and separated to obtain most asphaltene, secondary extraction on light components are carried out by using another solvent, asphaltene cannot be introduced into a subsequent pipeline, and deasphalted oil quality can be guaranteed. Multilayer filling materials are arranged on an extraction tower, multilayer filling materials are arranged in the extraction tower, increasing of asphaltene by following with a mixing solution can be avoided, asphaltene is retained in the extraction tower, introduction of the asphaltene into the subsequent pipeline can be avoided, and normal work of constant pressure device is influenced.

The invention relates to the technical field of asphalt mixtures, in particular to a hot mix plant recycling high-modulus asphalt mixture and a preparation method thereof. The asphalt mixture comprises the following components in parts by weight: 40-50 parts of milled old materials, 1-4 parts of new asphalt, 35-50 parts of new aggregate, 1-6 parts of mineral powder and 1-4 parts of auxiliary agent, wherein the auxiliary agent comprises the following components in parts by weight: 30-40 parts of low-density polyethylene, 20-25 parts of high-density polyethylene, 13-16 parts of a methyl styrene block copolymer, 10-20 parts of polyacrylonitrile, 15-20 parts of a high modulus agent, 5-8 parts of a warm mixing agent and 10-15 parts of a regenerant. The invention aims to provide the hot mix plant recycling high-modulus asphalt mixture and the preparation method thereof. The asphalt mixture has relatively high stiffness modulus and stable performance.